Reenforced disk film and method of reenforcing the same



Aug. 24, 1926. 1,597,184

J. J. DILKS, JR

REENFORCED DISK FILM AND METHOD GP REENFORCING THE SAME Filed July 15 1924 2 Sheets-Sheet 1 01v LINE 3- 3 i OFF/6],

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ATTORNEYE Aug. 24 1926. 1,597,184

1 J. J. DILKS, JR

REENFORCED DISK FILM AND METHOD OF REENFORCING THE SAME Filed July 15, 192 2 Sheets-Sheet 2 or ha. .9.

' zlydmum/Q 84:55 [20 ATTORNEYS.

Patented Aug. 24, 1926.

UNITED STATES PATENT OFFICE.

JAMES J. DILKB, JR, 0! PHILADELPHIA PENNSYLVANIA, ASSIGNOR TO DILKS BE- INI'OBCED FILM CORPORATION, OF PHILADELPHA, PENNSYLVANIA, A CORPORA- rr'ou or DELAWARE.

Application filed July 15,

In circular or disk films for moving pictures, which have recently come into vogue, wherein the peripheral edge of the film is provided with an annular series of sprocket holes, great difiiculty has been experienced on account of the walls of these sprocket holes becoming torn or broken in the projector thereby causing a stoppage of the rotation of the disk film and totally disabling it for further use.

In a prior patent granted to me on May 13, 1924, No. 1,493,924, I have shown and broadly claimed a novel means invented by me for reenforcing the edges of a film having perforated parallel side edges, and my present invention relates more particularly to a novel method of reenforcing and the reenforcement of said disk films, wherein I employ novel steps and means not disclosed in my prior patent aforesaid.

To the above ends my present invention consists in the novel steps hereinafter described for securing an annular reenforcement to a motion picture disk film, along the zone of the sprocket holes near the outer periphery thereof, whereby a novel reenforcement is attained, which can be effectively and expeditiously applied to the apertured peripheral edge of a disk film of the character referred to, and which will not only reenforce the outer peripheral edge thereof, but will in addition enable the film to behandled more readily with respect to the projector.

It further consists of a novel reenforced perforated disk film, having the annular reenforced peripherally applied to the annular perforated zone thereof, said reenforcing member having clinchingv means which pass through the annular series of perforations in the film, but are preferably free from contact with the edges of said perforations, in combination with an outer downwardly and inwardly turned annular flange or lip, which effectively encircles and engage's\the peripheral edge of said disk film, so that, the life thereof will be indefinitely prolonged.

It further consists of a novel reenforced.

disk film, having a novel top and bottom re enforcement.-

It further consists of other novel features 1924. Serial No. 726,127.

of constructions and advantage, all as will be hereinafter fully set forth.

For the purpose of illustrating my invention I have shown in the accompanying drawings forms thereof which are at present preferred by me, since the same have been found in practice to give satisfactory and reliable results, although it is to be understood that the various instrumentalities of which my invention consists can be variously arranged and organized and that my invention is not limited to the recise arrangement and organization of t e instrumentalities as herein shown and described.

Figure 1 represents a plan view of anunreenforced disk film, to which my invention is applicable, a portion of the annular series of sprocket holes being omitted. I

Figure 2 represents a plan view of the annular reenforcing element, prior to its subjection to the novel steps of my process.

- Figure 3 represents on an enlarged scale, a section on line 33, Figure 1. I

Figure 4 represents a. view similar to Figure 3 but showing the sprocket hole as slightly enlarged by the first step of my novel method hereafter referred to.

Figure 5 represents a section on line 5-5, Figure 14.

Figure 6 represents a section on line 6-6, Figure 14.

Figure 7 represents a section on line 7-7 of Figure 7 Figure 7 represents a perspective view of a portionof-a disk film, having the top and bottom reenforcement seen in Figure 7.

Figure 8 represents a vertical sectional view, of the top and bottom dies and their adjuncts for carrying out the first step of my novel method.

Figure 9 represents a perspective sectional view of the outer portion of the top and bottom and outer dies for carrying out the second step in my novel method.

Figure 10 represents a section on line 10.10 Figure 9.

Figure 11 represents a vertical sectional view of the means for performing the third step of my novel method,

Figure 12 represents a section on line 12-12 Figure 11.

Figure 13 represents a bottom plan view of a portion of a disk film reenforced in accordance with my invention.

Figure 14 represents a top plan view of the reenforced disk film seen in Figure 13.

Figure 15 represents a fragmentary perspective view of a portion of the reenforced disk film seen in Figure 14.

Similar numerals of reference indicate corresponding parts. I

Referring to the drawings 1 designates a moving picture disk film comprising the body 2 having the central hole 3 and the outer annular series of peripheral sprocket holes 4, whereby the film I is rotated or actuated by a projector spe cially designed therefor. I have shown in Figure 1 only a portion of said sprocket holes 4, but it will be understood that said sprocket holes extended around the entire periphery of the disk film.

In carrying out my invention, form an annular ring or blank 5 seen in Figure 2 of very thin sheet metal, and of a width greater than the length of the sprocket holes 4 as .will be understood from Figure 9. So as to afford an outer annular flange or lip 11 as seen in Figure 9 to be bent around the periphery of the disk film and to be clinched upon the bottom of said disk film when the reentorcing operation is completed.

In the first step of the operation, the disk film 2 is placed upon the bottom die 6, and centered thereon by the pin 7, which passes into the central hole 3 of the film. The upper die 8 containing the pendant punches 9 is then caused to descend, so that the punches pass through the sprocket holes 4, whereupon said holes 4 are slightly enlarged from the dimension seen in Figure 3, so that said holes now appear slightly enlarged, or as seen at 10 in Figure 4, it being understood that there are as many pendant punches 9, as there are sprocket holes 4, and that said punches are annularly arranged and descend in vertical alignment with said annularly arranged holes 4, which after the first expanding operation appear as seen at 10 in Figure 4 as stated.

The expanding of the sprocket holes having been effected, the die 8 and its adjuncts is removed or raised upwardly and the annular ring or blank 5 seen in Figure 2 is placed upon the disk film 2, the relative position thereof being understood from Figure 9, wherefrom it will be seen that the outer peripheral portion 11 of the blank 5 projects annularly a short distance beyond the outer edge 12 of the disk film 2. The upper die 13 with the pendant punches 14 is now caused to descend upon the blank 5 which sprocket holes 10.

pushed down entirely throughthe enlarged The bottom die 6' is provided with holes or seats to receive the pendant punches 14. Simultaneously with the formation of the tongues 15, the outer die member 16. descends upon the annular outer peripheral portion 11 as seenin Figure 9, and when said die 16 has moved downwardly from the position seen in full lines in Figure 9, to the position seen in dotted lines in said figure, it will be apparent that the annular flange 17 has been formed, said flange being seen in inverted position in Figure 11. 3

The dies. 13 and 16 and their adjuncts are next raised and the film disk 2, with the annular reenforcement thereon provided with the tongues 15 pressed through the holes'lO and the outer annular deflected flange 17 are then reversed or inverted so that they appear as seen in Figures 11 and 12, and are placed upon the bottom die 18 which is provided with the annularly arranged seats 19, the parts now appearing as seen in Figures 11 and 12. The upper die 20 having the annularly arranged pendants converging die faces 21, provided with the bevelled walls 22, and with the outer annular bevelled or outwardly inclined faces 23, is next caused. to descend upon the tongues 15 and annular flange 17, whereupon the tongues 15 are clinched upon the underside of the disk film, so that their terminals 24 appear as seen in Figure 13, While the outer flange 17 now appears as seen at 25 in Figure 13, being clinched annularly around the film edge and upon the bottom periphery of the film body 13. the parts also now appearing as seen in Figures 5 and 6.

In Figures 7 and 7 I have shown the tongues 15, as having their terminals 24 clinched upon the annular bottom reenforcing ring 26.

In this latter construction, when the bottom reenforeing ring 26 is employed, it will be understood that said bottom ring is originally substantially of the shape shown film body 2. The holes in the bottom ring 1 26 may be formed prior to the assembly of said bottom ring or reenforcement against the bottom of the body 2 or said holes may be formed simultaneously with the punching operation described with respect to Figures 9 and 10, it being-understood that in this latter method an annular ring 26 would be first placed 011 the top of the die 6. while the disk film body 2 would be superimposed thereon and the annular blank 5 would be placed upon said body 2. The punching and flange forming operations could be performed simultaneously in the manner shown in Figures 9 and 10. It-will be understood that while the annular blanks or rings 5 and 26 are preferably of thin sheet metal, possessing sufficient ductility to enablethe tongues 15 and the flanges 17 to be formed, any other suitable material or composition of material possessing the requisite strength or ductility may be en:- ployed.

From Figures 6 and 7 it will be apparent, 7

that when the tongues 15 are clinched on the bottom of the disk film or on the bottom of its reenforcement, there will be a very slight space 27 formed between the inner surface of the tongues and the juxtaposed walls of the sprocket holes, this being for the purpose of permitting a. slight degree of expansion with reference to the disk film and its reenforcement. I have deemed it unnecessary, to show or describe in detail any particular form of mechanism for the actuating of the upper dies 8, 13 and 20, since any suit-able mechanism for raising and lowering said dies may be employed.

In practice I prefer that the lower dies remain stationary and that the upper dies be actuated with respect thereto, but it will be obvious that both the upper and lower dies may be caused to be actuated or moved tdwards and away from each other, if desired. J

It will be apparent that if desired, the an nular outer peripheral reenforcement 25 may be omitted without departing from the spirit of my invention, but in. practice I preferably emplo the same, since it gives a neat and a finis ed appearance to the film andobviously assists in prolonging the life thereof.

It will be understood that, if desired, the completed reenforced disk film as seen in Figures 6, 7, 13 to 15 may have the reenforced'outer edge passed between a .pair of upper and lower rollers as a final finishing step in my novel method.

It will be apparent that the peripheral annular outer reenforcement or lip 25'terminutes at a oint intermediate the peripheral edge of tlie disk film and the outer wall of the sprocket holes, so that there is no impairment of the resiliency of the film at its outer portion, this construction being clearly shown in Figures 5, 13 and 15. i

It will be apparent thata disk film'reenforced in accordance with my invention will have its life indefinitely prolonged and in addition the reenforcement imparts a pleasing, attractive and finished appearance to the outer periphery of the disk film.

' Having thus described my invention what I claim as new and useful and desire to seannular peripheral series of sprocket holes therein, which consists in first superimposing on said film an annular blank of thin reenforcing material, next causing an annular series of tongues of said reenforcing mate rial to be formed and deflected through said annular series of sprocket holes, and lastly clinching the ends of said annularly arranged tongues on the bottom of said disk film.

2. The herein described method of reenforcing a moving picture disk filmhaving an annular peripheral series of sprocket holes therein, which consists in first superimposing on said film an annular blank of thin reenforcing material with its outer peripheral edge overhanging the peripheral edge of said disk film, next causing an annular series of tongues of said reenforcing materialto be formed and deflected through said annular series of sprocket holes and simultaneously forming an annular outer peripheral flange on said reenforcing maternal, and lastly clinching said tongues and outer flange upon the bottom of said disk film.

3. The herein described method of reenforcing a moving picture disk film having an annular peripheral series of sprocket holes therein, which consists in first enlarging said sprocket holes, next superimposin on said film an annular blank of thin, reen orcing' material, next causing an annular series of tongues of said reenforcing material to be formed and simultaneously deflected through said enlarged sprocket holes, and lastly clinching the ends of said tongues upon the bottom of said disk film.

4. The herein described method of reenforcing a moving picture disk film having an annular peripheral series of sprocket holes therein, which consists in first enlarging said sprocket holes, next superimposing on said film an annular blank ring of .thin ductile, reenforcing material having its outer periphery overhanging the peripheral edge of said disk film, next causing an annular series of tongues of said reenforcing material to be formed and simultaneously deflected through said enlarged sprocket holes and si-. multaneously forming an outer annular flange on said reenforcing blank, clinching the ends of said tongues on the bottom of said disk film, and clinching said outer peripheral flange around the outer peripheral edge of said disk film.

5. As a new article of manufacture, a moving picture disk film, having an annular series of peripheral sprocket holes therein, in combination with an annular reenforcement therefor provided with integral tongues passing through said sprocket holes and clinched on the under side thereof.

6. As a new article of manufacture, a mov ing picture disk film, having an annular series of peripheral sprocket holes therein, in

inent therefor provided with an annular series of integral tongues passing through said sprocket holes and an integral outer periph eral flange deflected around the edge of said disk film and clinched on the bottom thereof, the ends of said tongues being also clinched upon said disk. and a bottom annular apertured reenforcenient contiguous to the bottom of said disk Film and having the ends of sand tongues clinched thereupon.

JAM-ES J. DILKS, JR. 

